I'm kind of in a similar situation to what you were in. Because I would prefer to have all the required TK armour and accessories delivered to me at once I've been contemplating spending the $3,000 AUD (converted from £1,449.99) for the ANH Stunt Complete Stormtrooper Commission from RS Prop Masters, as it comes with a full kit and the option to have it pre-trimmed, and the fact that I've never seen myself as a 'handyman' or good with tools when it comes to assembly. But because I know this is a ridiculous amount of money to spend and the fact I wouldn't otherwise have much involvement in its assembly I would feel that I'm somewhat cheating and not taking the time to make the costume my own.
Fortunately I think I've narrowed down two potential suppliers for me to buy a ANH Stunt from: ATA and AP. I've been told that AM should be used for taller body sizes (that is, taller than 6'2'') so I've steered away from that so far.